springboot 添加过滤器

1.在项目中建一个filter包　过滤器都放在里面

package com.demo.xianghuan.filter;

２.在上面的包中建一个class

package com.demo.xianghuan.filter;

import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

@Component
@WebFilter(urlPatterns = "/base/user/*",filterName = "userFilter")
public class UserFilter implements Filter{
	
	private static final Logger log = LoggerFactory.getLogger(UserFilter.class);
	
	@Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

	@Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
        
        
        HttpServletRequest httpServletRequest = (HttpServletRequest)request;
		
		Map<String, String> paramMap = servletParameterMapToMap(httpServletRequest.getParameterMap());
		String uri = httpServletRequest.getRequestURI();
		
		log.info("请求地址 ： " + uri + "，请求方式：" + httpServletRequest.getMethod() + "，请求的参数列表 ： " + paramMap);
		filterChain.doFilter(request, response);
    }

	@Override
    public void destroy() {

    }
	
    // 参数处理
	@SuppressWarnings("rawtypes")
	public synchronized Map<String, String> servletParameterMapToMap(Map paramMap){
		Map<String, String> map = new HashMap<String, String>();
		if(paramMap!=null){
			Iterator<?> entrys = paramMap.entrySet().iterator();
			Map.Entry entry;
			String key = null;
			String value = null;
			while(entrys.hasNext()){
				entry = (Map.Entry)entrys.next();
				
				key = (String)entry.getKey();
				Object valueObj = entry.getValue();
				if(valueObj == null){
					value = "";
				}else if(valueObj instanceof String[]){
					String values[] = (String[])valueObj;
					for(String tval:values){
						value = tval + ",";
					}
					value = value.substring(0,value.length()-1);
				}else{
					value = valueObj.toString();
				}
				map.put(key, value);
			}
		}
		return map;
	}
}

注：urlPatterns就是你要过滤的路径 

3.在启动类（**Application.java ）上添加注解

@ServletComponentScan